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2-D absolute OH concentration profiles in atmospheric flames using planar LIF in a bi-directional laser beam configuration

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Author

Summary, in English

A technique has been developed to measure the absolute OH concentration at atmospheric pressures by using a combination of direct absorption and laser-induced fluorescence (LIF) detection. The technique is independent of collisions, because it uses laser beams in a bi-directional configuration, thereby eliminating collisional quenching. The absolute OH concentration is measured spatially resolved in two dimensions by using absorption on the Q(1)(6) rotational line in the A(2) Sigma(+) (upsilon' = 0) <-- X-2 Pi(upsilon '' = 0) band of OH at 309 nm. The requirements for obtaining a good signal-to-noise ratio for the technique are discussed and the possibilities of single-shot measurements are investigated.

Publishing year

1997

Language

English

Pages

411-417

Publication/Series

Applied Physics B: Lasers and Optics

Volume

65

Issue

3

Document type

Journal article

Publisher

Springer

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • A2-SIGMA+
  • CALIBRATION
  • PREDISSOCIATION
  • INDUCED FLUORESCENCE
  • CAVITY RING
  • SPECTROSCOPY

Status

Published

ISBN/ISSN/Other

  • ISSN: 0946-2171